While it also allows you to communicate exactly how you feel about something as you feel more able to be honest.

By swearing, a person can express fury, loathing or pain, without the threat of the argument turning physical.

It was also suggested that those who swore more often were less likely to lie and have higher levels of intergirty [sic].

To be fair, The Sun is probably not intentionally defending Trump. Furthermore, Donald Trump referring to s-hole countries probably may not technically swearing. Nevertheless, it's an interesting juxtaposition.